The inventions that contributed to the increase of industry in cities in the late 1800s among the options provided are:
- The telegram: This facilitated communication, which was essential for coordinating business and industrial operations.
- Electric power: The widespread adoption of electricity revolutionized manufacturing processes and allowed factories to operate more efficiently and for longer hours.
Water power was also significant in earlier industrial developments but became less dominant in the late 1800s as electric power became more widespread. The plow is more related to agriculture than industry.